The Clayton water regulator at Lake Alexandrina at the Murray mouth might go soon.

South Australia's Water Minister Paul Caica will speak at a meeting at Milang on Tuesday night about the environmental requirements to enable the regulator's full or partial removal.

It separates Lake Alexandrina from Currency Creek and the Finniss River and was built as part of efforts to stop the tributaries draining into the lower lakes during prolonged drought.

Mr Caica believes it will be open before the year is out.

"Quite frankly, the indicators are looking very good that that regulator will be removed in the not-too-distant future," he said.

"Certainly, and if not fully removed, partially removed to ensure that the various scenarios that we're working on in regard to the water coming down [the Murray] will be enough to justify its complete and utter removal."

Floodwaters flowing down the Murray into South Australia's lower lakes are expected to do little for the drought-affected Coorong wetlands.

President of the Southern Fishermen's Association Gary Hera-Singh said a major flood event was needed to help save the Coorong.

"These events historically were every second year and since white man has taken over and over-extracted the water, they're only one-in-10-year events now," he said.

He said the water reaching the Coorong has only affected 10 per cent of its area.